2 * thread-stack.h: Synthesize a thread's stack using call / return events
3 * Copyright (c) 2014, Intel Corporation.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 #ifndef __PERF_THREAD_STACK_H
17 #define __PERF_THREAD_STACK_H
19 #include <sys/types.h>
21 #include <linux/types.h>
36 * CALL_RETURN_NO_CALL: 'return' but no matching 'call'
37 * CALL_RETURN_NO_RETURN: 'call' but no matching 'return'
38 * CALL_RETURN_NON_CALL: a branch but not a 'call' to the start of a different
42 CALL_RETURN_NO_CALL
= 1 << 0,
43 CALL_RETURN_NO_RETURN
= 1 << 1,
44 CALL_RETURN_NON_CALL
= 1 << 2,
48 * struct call_return - paired call/return information.
49 * @thread: thread in which call/return occurred
50 * @comm: comm in which call/return occurred
52 * @call_time: timestamp of call (if known)
53 * @return_time: timestamp of return (if known)
54 * @branch_count: number of branches seen between call and return
55 * @call_ref: external reference to 'call' sample (e.g. db_id)
56 * @return_ref: external reference to 'return' sample (e.g. db_id)
57 * @db_id: id used for db-export
58 * @parent_db_id: id of parent call used for db-export
59 * @flags: Call/Return flags
62 struct thread
*thread
;
76 * struct call_return_processor - provides a call-back to consume call-return
78 * @cpr: call path root
79 * @process: call-back that accepts call/return information
80 * @data: anonymous data for call-back
82 struct call_return_processor
{
83 struct call_path_root
*cpr
;
84 int (*process
)(struct call_return
*cr
, u64
*parent_db_id
, void *data
);
88 int thread_stack__event(struct thread
*thread
, int cpu
, u32 flags
, u64 from_ip
,
89 u64 to_ip
, u16 insn_len
, u64 trace_nr
);
90 void thread_stack__set_trace_nr(struct thread
*thread
, int cpu
, u64 trace_nr
);
91 void thread_stack__sample(struct thread
*thread
, int cpu
, struct ip_callchain
*chain
,
92 size_t sz
, u64 ip
, u64 kernel_start
);
93 int thread_stack__flush(struct thread
*thread
);
94 void thread_stack__free(struct thread
*thread
);
95 size_t thread_stack__depth(struct thread
*thread
, int cpu
);
97 struct call_return_processor
*
98 call_return_processor__new(int (*process
)(struct call_return
*cr
, u64
*parent_db_id
, void *data
),
100 void call_return_processor__free(struct call_return_processor
*crp
);
101 int thread_stack__process(struct thread
*thread
, struct comm
*comm
,
102 struct perf_sample
*sample
,
103 struct addr_location
*from_al
,
104 struct addr_location
*to_al
, u64 ref
,
105 struct call_return_processor
*crp
);